Oleksandr Turchynov

SLOVYANSK, Ukraine — Ukraine launched an offensive against separatist forces for control of a besieged eastern city Friday, while clashes between pro- and anti-government activists in the previously calm southern...

HORLIVKA, Ukraine — Pro-Russian insurgents who have seized government buildings across eastern Ukraine dug in on Tuesday, fortifying their positions and erecting fresh barricades as Ukrainian tanks were seen within...